Cup assembly

ABSTRACT

A cup assembly includes a paper cup and a plastic lip is formed on the periphery of the open top of the cup. The lip includes a first spiral portion formed thereon. A cap has a second spiral portion formed on an inside thereof and the second spiral portion is engaged with the first spiral portion. The cap is easily removed from or mounted to the cup without shaking the cup to prevent the coffee or juice in the cup from splitting out.

BACKGROUND OF THE INVENTION

(1) Field of the Invention

The present invention relates to a cup assembly, and more particularly, to a paper cup and its cap which is rotated to be connected to the cup.

(2) Description of the Prior Art

The conventional take-out service for coffee or juice generally uses a cup with a cap mounted on the cup, and the cup and cap are shown in FIG. 1. The cup 100 has an open top and the cap 200 is mounted to the open top of the cup. The cap 200 has a circular hole 201 defined in a top and located close to the periphery of the cap 200 so that the user can access the coffee or juice via the hole 201. In order to add sugar or cream to the coffee in the cup 100, the user has to remove the cap 200 from the cup 100. However, the cap 100 is forced mounted onto the cup 100 so that the user has to carefully pull the flange of the cap 200 outward or upward to remove the cap 200 from the cup 100. During the action, the coffee in the cup 100 easily splits out and this is a problem for the users to remove the cap 200.

The present invention intends to provide a cup assembly wherein the cap is rotated an angle to be mounted to the cup and the cap can be easily removed from the cup when needed.

SUMMARY OF THE INVENTION

The present invention relates to a cup assembly and comprises a cup made of paper material and a lip is formed on a periphery of an open top of the cup. The lip is made of plastic material and has a first spiral portion formed thereon. A cap has a second spiral portion formed on an inside thereof and the second spiral portion is engaged with the first spiral portion.

The primary object of the present invention is to provide a cup assembly wherein the cap is rotated an angle to be mounted on or removed from the cup.

The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view to show the conventional cup assembly;

FIG. 2 is an exploded view to show the cup assembly of the present invention;

FIG. 3 is an exploded view to show the second embodiment of the cup assembly of the present invention, and

FIG. 4 is a cross sectional view of the cup assembly of the present invention, wherein the cap is mounted to the cup.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIGS. 2 to 4, the cup assembly of the present invention comprises a cup 10 and a cap 20, wherein the cup 10 is made of paper material and a lip 12 is formed on a periphery of an open top 11 of the cup 10 so that coffee or juice can be stored in the cup 10. The lip 12 is made of bio-degradable plastic material or food-grade plastic material. The lip 12 has a first spiral portion 121 formed thereon. The lip 12 is formed by way of plastic injection or post-attached to the cup 10 by a proper machine which is not shown. The cup 10 is water-proof surface which is a film (not shown) coated on the cup 10. The lip 12 can also be integrally formed with the cup 10.

The cap 20 has a hole 21 defined therethrough so that the coffee or juice can be accessed via the hole 21 by a straw. A second spiral portion 22 is formed on an inside thereof and the second spiral portion 22 is engaged with the first spiral portion 121.

The spiral direction of the first spiral portion 121 and the spiral direction of the second spiral portion 22 are in opposite to each other so that when the first and second spiral portions 121, 22 can be easily engaged with each other.

FIG. 3 show that the first and second spiral portions 121, 22 each are composed of multiple sections 122, 123, 124 which are located at equal distances from each other.

When mounting the cap 20 to the cup 10 or removing the cap 20 from the cup 10, the user simply rotates the cap 20 an angle to easily achieve the purpose without shaking the cup 10 so as to prevent the coffee or juice in the cup 10 from splitting out.

While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention. 

1. A cup assembly comprising: a cup made of paper material and a lip formed on a periphery of an open top of the cup, the lip made of plastic material and having a first spiral portion formed thereon, and a cap having a second spiral portion formed on an inside thereof and the second spiral portion engaged with the first spiral portion.
 2. The assembly as claimed in claim 1, wherein the lip is formed by way of plastic injection.
 3. The assembly as claimed in claim 1, wherein the lip is post-attached to the cup.
 4. The assembly as claimed in claim 1, wherein the lip is made of bio-degradable plastic material.
 5. The assembly as claimed in claim 1, wherein the first and second spiral portions each are composed of multiple sections which are located at equal distances from each other. 